Three Way Catalytic Converter, TWC Checking

Test requirements 

• Battery voltage at least 12.5 volts.
• Oxygen Sensors OK.
• No leaks or damage to exhaust system.

Function test 

-- Perform the function test in Diagnostic Mode 06. Refer to DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS .

-- Switch the ignition off.

If the specified values are exceeded: 

-- Check the exhaust system for leaks.

-- If necessary, repair the leak in the exhaust system.

-- Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

-- Perform a road test to verify Repair.

If the DTC does Not return: 

Generate readiness code. Refer to READINESS CODE .

If no leaks are found in the exhaust system: 

-- Replace the catalytic converter with front exhaust pipe.

Final procedures 

After the repair work, the following work steps must be performed in the following sequence: 

1. Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .